The head of bids asks IT to approve an AI model on an export of past bids, with the CVs left out. You and the head of bids agree the policy: client names and day rates are marked. The model receives the bid register with those columns as placeholders, and drafts from it and from past bids in Word, whose text reaches it as written. A bid writer not cleared for day rates who asks for that column is refused, and the refusal is recorded.
Fields you mark sensitive reach the AI model masked with placeholders; fields you don't mark reach it as they are. The same value always gets the same placeholder, so masked data can still be linked to a person and remains personal data.
On records loaded into Kovac, someone not cleared for a column you have marked who asks for it is refused, and the refusal is recorded.
Clearance decides what a person may read. It never unmasks a field for the AI model: a marked field reaches the model masked on every call, whoever asks.